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-rw-r--r--carl9170fw/carlfw/src/main.c256
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diff --git a/carl9170fw/carlfw/src/main.c b/carl9170fw/carlfw/src/main.c
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+/*
+ * carl9170 firmware - used by the ar9170 wireless device
+ *
+ * initialization and main() loop
+ *
+ * Copyright (c) 2000-2005 ZyDAS Technology Corporation
+ * Copyright (c) 2007-2009 Atheros Communications, Inc.
+ * Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
+ * Copyright 2009-2011 Christian Lamparter <chunkeey@googlemail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "carl9170.h"
+#include "timer.h"
+#include "hostif.h"
+#include "printf.h"
+#include "gpio.h"
+#include "wl.h"
+#include "rf.h"
+#include "usb.h"
+
+#define AR9170_WATCH_DOG_TIMER 0x100
+
+static void timer_init(const unsigned int timer, const unsigned int interval)
+{
+ /* Set timer to periodic mode */
+ orl(AR9170_TIMER_REG_CONTROL, BIT(timer));
+
+ /* Set time interval */
+ set(AR9170_TIMER_REG_TIMER0 + (timer << 2), interval - 1);
+
+ /* Clear timer interrupt flag */
+ orl(AR9170_TIMER_REG_INTERRUPT, BIT(timer));
+}
+
+void clock_set(enum cpu_clock_t clock_, bool on)
+{
+ /*
+ * Word of Warning!
+ * This setting does more than just mess with the CPU Clock.
+ * So watch out, if you need _stable_ timer interrupts.
+ */
+#ifdef CONFIG_CARL9170FW_RADIO_FUNCTIONS
+ if (fw.phy.frequency < 3000000)
+ set(AR9170_PWR_REG_PLL_ADDAC, 0x5163);
+ else
+ set(AR9170_PWR_REG_PLL_ADDAC, 0x5143);
+#else
+ set(AR9170_PWR_REG_PLL_ADDAC, 0x5163);
+#endif /* CONFIG_CARL9170FW_RADIO_FUNCTIONS */
+
+ fw.ticks_per_usec = GET_VAL(AR9170_PWR_PLL_ADDAC_DIV,
+ get(AR9170_PWR_REG_PLL_ADDAC));
+
+ set(AR9170_PWR_REG_CLOCK_SEL, (uint32_t) ((on ? 0x70 : 0x600) | clock_));
+
+ switch (clock_) {
+ case AHB_20_22MHZ:
+ fw.ticks_per_usec >>= 1;
+ case AHB_40MHZ_OSC:
+ case AHB_40_44MHZ:
+ fw.ticks_per_usec >>= 1;
+ case AHB_80_88MHZ:
+ break;
+ }
+}
+
+static void init(void)
+{
+ led_init();
+
+#ifdef CONFIG_CARL9170FW_DEBUG_UART
+ uart_init();
+#endif /* CONFIG_CARL9170FW_DEBUG_UART */
+
+ /* 25/50/100ms timer (depends on cpu clock) */
+ timer_init(0, 50000);
+
+ /* USB init */
+ usb_init();
+
+ /* initialize DMA memory */
+ memset(&dma_mem, 0, sizeof(dma_mem));
+
+ /* fill DMA rings */
+ dma_init_descriptors();
+
+ /* clear all interrupt */
+ set(AR9170_MAC_REG_INT_CTRL, 0xffff);
+
+ orl(AR9170_MAC_REG_AFTER_PNP, 1);
+
+ /* Init watch dog control flag */
+ fw.watchdog_enable = 1;
+
+ set(AR9170_TIMER_REG_WATCH_DOG, AR9170_WATCH_DOG_TIMER);
+
+#ifdef CONFIG_CARL9170FW_GPIO_INTERRUPT
+ fw.cached_gpio_state.gpio = get(AR9170_GPIO_REG_PORT_DATA) &
+ CARL9170_GPIO_MASK;
+#endif /* CONFIG_CARL9170FW_GPIO_INTERRUPT */
+
+ /* this will get the downqueue moving. */
+ down_trigger();
+}
+
+static void handle_fw(void)
+{
+ if (fw.watchdog_enable == 1)
+ set(AR9170_TIMER_REG_WATCH_DOG, AR9170_WATCH_DOG_TIMER);
+
+ if (fw.reboot)
+ reboot();
+}
+
+static void timer0_isr(void)
+{
+ wlan_timer();
+
+#ifdef CONFIG_CARL9170FW_GPIO_INTERRUPT
+ gpio_timer();
+#endif /* CONFIG_CARL9170FW_GPIO_INTERRUPT */
+
+#ifdef CONFIG_CARL9170FW_DEBUG_LED_HEARTBEAT
+ set(AR9170_GPIO_REG_PORT_DATA, get(AR9170_GPIO_REG_PORT_DATA) ^ 1);
+#endif /* CONFIG_CARL9170FW_DEBUG_LED_HEARTBEAT */
+}
+
+static void handle_timer(void)
+{
+ uint32_t intr;
+
+ intr = get(AR9170_TIMER_REG_INTERRUPT);
+
+ /* ACK timer interrupt */
+ set(AR9170_TIMER_REG_INTERRUPT, intr);
+
+#define HANDLER(intr, flag, func) \
+ do { \
+ if ((intr & flag) != 0) { \
+ intr &= ~flag; \
+ func(); \
+ } \
+ } while (0)
+
+ HANDLER(intr, BIT(0), timer0_isr);
+
+ if (intr)
+ DBG("Unhandled Timer Event %x", (unsigned int) intr);
+
+#undef HANDLER
+}
+
+static void tally_update(void)
+{
+ unsigned int boff, time, delta;
+
+ time = get_clock_counter();
+ if (fw.phy.state == CARL9170_PHY_ON) {
+ delta = (time - fw.tally_clock);
+
+ fw.tally.active += delta;
+
+ boff = get(AR9170_MAC_REG_BACKOFF_STATUS);
+ if (boff & AR9170_MAC_BACKOFF_TX_PE)
+ fw.tally.tx_time += delta;
+ if (boff & AR9170_MAC_BACKOFF_CCA)
+ fw.tally.cca += delta;
+ }
+
+ fw.tally_clock = time;
+ fw.counter++;
+}
+
+static void __noreturn main_loop(void)
+{
+ /* main loop */
+ while (1) {
+ handle_fw();
+
+ /*
+ * Due to frame order persevation, the wlan subroutines
+ * must be executed before handle_host_interface.
+ */
+ handle_wlan();
+
+ handle_host_interface();
+
+ handle_usb();
+
+ handle_timer();
+
+ tally_update();
+ }
+}
+
+/*
+ * The bootcode will work with the device driver to load the firmware
+ * onto the device's Program SRAM. The Program SRAM has a size of 16 KB
+ * and also contains the stack, which grows down from 0x204000.
+ *
+ * The Program SRAM starts at address 0x200000 on the device.
+ * The firmware entry point (0x200004) is located in boot.S.
+ * we put _start() there with the linker script carl9170.lds.
+ */
+
+void __section(boot) start(void)
+{
+ clock_set(AHB_40MHZ_OSC, true);
+
+ /* watchdog magic pattern check */
+ if ((get(AR9170_PWR_REG_WATCH_DOG_MAGIC) & 0xffff0000) == 0x12340000) {
+ /* watch dog warm start */
+ incl(AR9170_PWR_REG_WATCH_DOG_MAGIC);
+ usb_trigger_out();
+ } else if ((get(AR9170_PWR_REG_WATCH_DOG_MAGIC) & 0xffff0000) == 0x98760000) {
+ /* suspend/resume */
+ }
+
+ /* write the magic pattern for watch dog */
+ andl(AR9170_PWR_REG_WATCH_DOG_MAGIC, 0xFFFF);
+ orl(AR9170_PWR_REG_WATCH_DOG_MAGIC, 0x12340000);
+
+ init();
+
+#ifdef CONFIG_CARL9170FW_DEBUG
+
+ BUG("TEST BUG");
+ BUG_ON(0x2b || !0x2b);
+ INFO("INFO MESSAGE");
+
+ /* a set of unique characters to detect transfer data corruptions */
+ DBG("AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz"
+ " ~`!1@2#3$4%%5^6&7*8(9)0_-+={[}]|\\:;\"'<,>.?/");
+#endif /* CONFIG_CARL9170FW_DEBUG */
+
+ /*
+ * Tell the host, that the firmware has booted and is
+ * now ready to process requests.
+ */
+ send_cmd_to_host(0, CARL9170_RSP_BOOT, 0x00, NULL);
+ main_loop();
+}